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PRODUCT WARRANTIES (Details) - USD ($)
$ in Thousands
12 Months Ended
Dec. 31, 2021
Dec. 31, 2020
Movement in Standard Product Warranty Accrual [Roll Forward]    
Beginning balance $ 498 $ 452
Provision for product warranties 318 215
Product warranty costs incurred (223) (169)
Accrued product warranties $ 593 $ 498